CentOS7 安装redis6，主从复制，配置成服务，自启动，replicaof ，slaveof

缺乏、安全感 2023-01-21 02:30 28阅读 0赞

linux版下载地址

[http://download.redis.io/releases/][http_download.redis.io_releases]

windows版下载地址

[https://github.com/MicrosoftArchive/redis/releases][https_github.com_MicrosoftArchive_redis_releases]

# 一、安装 #

上传redis-6.2.3.tar.gz到/opt下

\[root@bogon opt\]\# tar -zxvf redis-6.2.3.tar.gz  
\[root@bogon opt\]\# cd redis-6.2.3/

\[root@bogon redis-6.2.3\]\# make

指定安装目录PREFIX  
\[root@bogon redis-6.2.3\]\# make install **PREFIX**=/opt/redis6  
\[root@bogon opt\]\# cd /opt/redis6  
\[root@bogon redis6\]\# ll  
总用量 0  
drwxr-xr-x. 2 root root 134 5月  10 23:29 bin  
\[root@bogon redis6\]\# cd bin ll  
\[root@bogon bin\]\# ll  
总用量 18872  
\-rwxr-xr-x. 1 root root 4829416 5月  10 23:29 redis-benchmark  
lrwxrwxrwx. 1 root root      12 5月  10 23:29 redis-check-aof -> redis-server  
lrwxrwxrwx. 1 root root      12 5月  10 23:29 redis-check-rdb -> redis-server  
\-rwxr-xr-x. 1 root root 5002832 5月  10 23:29 redis-cli  
lrwxrwxrwx. 1 root root      12 5月  10 23:29 redis-sentinel -> redis-server  
\-rwxr-xr-x. 1 root root 9484192 5月  10 23:29 redis-server

# **二、启动服务** #

\[root@bogon bin\]\# ./redis-server  
59122:C 11 May 2021 18:16:40.791 \# oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo  
59122:C 11 May 2021 18:16:40.791 \# Redis version=6.2.3, bits=64, commit=00000000, modified=0, pid=59122, just started  
59122:C 11 May 2021 18:16:40.791 \# Warning: no config file specified, using the default config. In order to specify a config file use ./redis-server /path/to/redis.conf  
59122:M 11 May 2021 18:16:40.792 \* monotonic clock: POSIX clock\_gettime  
                \_.\_                                                    
           \_.-\`\`\_\_ ''-.\_                                               
      \_.-\`\`    \`.  \`\_.  ''-.\_           Redis 6.2.3 (00000000/0) 64 bit  
  .-\`\` .-\`\`\`.  \`\`\`\\/    \_.,\_ ''-.\_                                    
 (    '      ,       .-\`  | \`,    )     Running in standalone mode  
 |\`-.\_\`-...-\` \_\_...-.\`\`-.\_|'\` \_.-'|     Port: 6379  
 |    \`-.\_   \`.\_    /     \_.-'    |     PID: 59122  
  \`-.\_    \`-.\_  \`-./  \_.-'    \_.-'                                     
 |\`-.\_\`-.\_    \`-.\_\_.-'    \_.-'\_.-'|                                    
 |    \`-.\_\`-.\_        \_.-'\_.-'    |           https://redis.io         
  \`-.\_    \`-.\_\`-.\_\_.-'\_.-'    \_.-'                                     
 |\`-.\_\`-.\_    \`-.\_\_.-'    \_.-'\_.-'|                                    
 |    \`-.\_\`-.\_        \_.-'\_.-'    |                                    
  \`-.\_    \`-.\_\`-.\_\_.-'\_.-'    \_.-'                                     
      \`-.\_    \`-.\_\_.-'    \_.-'                                         
          \`-.\_        \_.-'                                             
              \`-.\_\_.-'

59122:M 11 May 2021 18:16:40.794 \# WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.  
59122:M 11 May 2021 18:16:40.794 \# Server initialized  
59122:M 11 May 2021 18:16:40.794 \# WARNING overcommit\_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit\_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit\_memory=1' for this to take effect.  
59122:M 11 May 2021 18:16:40.794 \* Ready to accept connections

^C59122:signal-handler (1620728333) Received SIGINT scheduling shutdown...  
59122:M 11 May 2021 18:18:53.485 \# User requested shutdown...  
59122:M 11 May 2021 18:18:53.485 \* Saving the final RDB snapshot before exiting.  
59122:M 11 May 2021 18:18:53.576 \* DB saved on disk  
59122:M 11 May 2021 18:18:53.576 \# Redis is now ready to exit, bye bye...

**解决两个警告**

警告：无法强制执行TCP backlog设置511，因为/proc/sys/net/core/somaxconn设置为较低的值128。

解决：[redis优化/proc/sys/net/core/somaxconn][redis_proc_sys_net_core_somaxconn]

警告：内存设置为0！在内存不足的情况下，后台保存可能会失败。若要解决此问题，请将“vm.overcommit\_memory =1”添加到/etc/sysctl.conf，然后重新启动或运行命令“sysctl vm.overcommit\_memory =1”使其生效。

\[root@bogon ~\]\# vi /etc/sysctl.conf  
加入：  
net.core.somaxconn = 2048  
vm.overcommit\_memory = 1  
使之生效  
\[root@bogon ~\]\# sysctl -p

# 三、客户端访问 #

打卡新窗口  
\[root@bogon ~\]\# cd /opt/redis6/bin/  
\[root@bogon bin\]\# ./redis-cli  
127.0.0.1:6379> get foo  
(nil)  
127.0.0.1:6379> set foo bar  
OK  
127.0.0.1:6379> get foo  
"bar"  
127.0.0.1:6379> del foo  
(integer) 1  
127.0.0.1:6379> get foo  
(nil)  
127.0.0.1:6379> exit  
\[root@bogon bin\]\# ./redis-cli   
127.0.0.1:6379> quit

# 四、配置文件 #

创建目录（非必须），配置文件目录，数据库文件目录，日志文件目录

\[root@bogon bin\] cd /opt/redis6  
\[root@bogon redis6\]\# mkdir conf db logs

拷贝配置文件  
\[root@bogon redis6\]\# cp /opt/redis-6.2.3/redis.conf /opt/redis6/conf

编辑配置文件  
\[root@bogon redis6\]\# vi /opt/redis6/conf/redis.conf

注释bind，或加入\#bind 0.0.0.0（绑定本机可以接受访问的IP）  
\#bind 127.0.0.1 -::1  
\#bind 0.0.0.0

\#关闭保护模式  
\#protected-mode yes  
protected-mode no

守护进程，在后台运行  
\#daemonize no  
daemonize yes

设置pid文件路径  
\#pidfile /var/run/redis\_6379.pid  
pidfile /opt/redis6/redis\_6379.pid

\#设置数据库文件路径  
dbfilename dump.rdb

\#dir ./  
dir /opt/redis6/db

\#设置日志文件路径  
\#logfile ""  
logfile /opt/redis6/logs/redis.log

\#设置连接密码  
\# requirepass foobared  
requirepass redis623

\#设置主密码（主从复制时使用，主从切换会用到）  
\# masterauth <master-password>  
masterauth redis623

设置最大内存  
\# maxmemory <bytes>  
maxmemory 10gb

# 五、应用 #

**启动redis服务**

\[root@bogon redis6\]\# /opt/redis6/bin/redis-server /opt/redis6/conf/redis.conf

**打开redis客户端，测试**  
\[root@bogon ~\]\# /opt/redis6/bin/redis-cli -h 127.0.0.1 -p 6379 -a redis623  
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.  
127.0.0.1:6379> set foo bar  
OK  
127.0.0.1:6379> get foo  
"bar"  
127.0.0.1:6379> del foo  
(integer) 1  
127.0.0.1:6379> quit (退出)

**停止redis服务**  
\[root@dev redis\]\# /opt/redis6/bin/redis-cli -h 127.0.0.1 -p 6379 -a redis623 shutdown

杀进程  
\[root@bogon redis6\]\# ps -ef|grep redis  
root     300865      1  0 17:16 ?        00:00:00 /opt/redis6/bin/redis-server 127.0.0.1:6379  
root     300871 300392  0 17:16 pts/0    00:00:00 grep --color=auto redis

\[root@dev bin\]\# kill -9 300865

**查看日志**  
\[root@dev redis\]tail -f /opt/redis6/logs/redis.log

性能测试

\[root@dev bin\]\# /opt/redis6/bin/redis-benchmark -n 1000 -a redis623

# **六、主从复制** #

在从的配置文件加入  
新版本  
\# replicaof <masterip> <masterport>  
**replicaof** 10.16.10.172 6379

老版本  
slaveof 10.16.10.172 6379

**报错的解决**  
1.需要设置主密码masterauth  
59518:S 11 May 2021 18:46:53.749 \* Retrying with SYNC...  
59518:S 11 May 2021 18:46:53.750 \# MASTER aborted replication with an error: NOAUTH Authentication required.  
59518:S 11 May 2021 18:46:53.750 \* Reconnecting to MASTER 10.16.10.172:6379 after failure  
59518:S 11 May 2021 18:46:53.750 \* MASTER <-> REPLICA sync started  
59518:S 11 May 2021 18:46:53.750 \* Non blocking connect for SYNC fired the event.  
59518:S 11 May 2021 18:46:53.750 \* Master replied to PING, replication can continue...  
59518:S 11 May 2021 18:46:53.750 \* (Non critical) Master does not understand REPLCONF listening-port: -NOAUTH Authentication required.  
59518:S 11 May 2021 18:46:53.750 \* (Non critical) Master does not understand REPLCONF capa: -NOAUTH Authentication required.  
59518:S 11 May 2021 18:46:53.750 \* Partial resynchronization not possible (no cached master)  
59518:S 11 May 2021 18:46:53.750 \# Unexpected reply to PSYNC from master: -NOAUTH Authentication required.

2.设置主密码后，requirepass和masterauth密码得一致  
59657:S 11 May 2021 18:53:31.556 \* Connecting to MASTER 10.16.10.172:6379  
59657:S 11 May 2021 18:53:31.556 \* MASTER <-> REPLICA sync started  
59657:S 11 May 2021 18:53:31.556 \* Non blocking connect for SYNC fired the event.  
59657:S 11 May 2021 18:53:31.556 \* Master replied to PING, replication can continue...  
59657:S 11 May 2021 18:53:31.556 \# Unable to AUTH to MASTER: -WRONGPASS invalid username-password pair or user is disabled.

3.注释bind 127.0.0.1 -::1或加：bind 0.0.0.0，解决

59817:S 11 May 2021 19:04:56.115 \* Connecting to MASTER 10.16.10.172:6379  
59817:S 11 May 2021 19:04:56.115 \* MASTER <-> REPLICA sync started  
59817:S 11 May 2021 19:04:56.115 \# Error condition on socket for SYNC: Connection refused

# 七、配置成服务，自启动 #

\[root@bogon ~\]\# vim /usr/lib/systemd/system/redis\_6379.service

[Unit]
    Description=redis_6379
    After=network.target
    
    [Service]
    Type=forking
    ExecStart=/opt/redis6/bin/redis-server /opt/redis6/conf/redis.conf
    ExecReload=/bin/kill -s HUP $MAINPID
    ExecStop=/opt/redis6/bin/redis-cli -a redis623 shutdown
    PrivateTmp=true
    
    [Install]
    WantedBy=multi-user.target

ExecStop这么写比ExecStop=/bin/kill -s QUIT $MAINPID友好点，停止时会做处理，会有日志。

配置项中的意义可以百度搜索：Systemd Unit文件。

启动停止服务  
\[root@bogon ~\]\# systemctl start redis\_6379  
\[root@bogon ~\]\# systemctl stop redis\_6379

配置成自启动  
\[root@bogon ~\]\# systemctl enable redis\_6379  
Created symlink from /etc/systemd/system/multi-user.target.wants/redis\_6379.service to /usr/lib/systemd/system/redis\_6379.service.

配置文件修改后。  
Warning: redis\_6379.service changed on disk. Run 'systemctl daemon-reload' to reload units.  
\[root@bogon ~\]\# systemctl daemon-reload

另外以下的两个文件都可以配置自启动

/opt/redis-6.2.3/utils/redis\_init\_script  
/opt/redis-6.2.3/utils/install\_server.sh

[redis5 集群自启动][redis5]

[http_download.redis.io_releases]: http://download.redis.io/releases/
[https_github.com_MicrosoftArchive_redis_releases]: https://github.com/MicrosoftArchive/redis/releases
[redis_proc_sys_net_core_somaxconn]: https://blog.csdn.net/haveqing/article/details/84835397
[redis5]: https://blog.csdn.net/haveqing/article/details/105233798